package org.spiderflow.core.job;

import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.spiderflow.core.Spider;
import org.spiderflow.core.model.SpiderFlow;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * 爬虫定时执行管理
 */
@Component
public class SpiderJobManager {

    private static final Logger logger = LoggerFactory.getLogger(SpiderJobManager.class);
    private final static String JOB_NAME = "SPIDER_TASK_";
    public final static String JOB_PARAM_NAME = "SPIDER_FLOW";

    @Autowired
    private SpiderJob spiderJob;
    @Autowired
    private Scheduler scheduler;

    private JobKey getJobKey(String id) {
        return JobKey.jobKey(JOB_NAME + id);
    }

    private TriggerKey getTriggerKey(String id) {
        return TriggerKey.triggerKey(JOB_NAME + id);
    }

    /**
     * 新建定时任务
     *
     * @param spiderFlow 爬虫流程图
     * @return boolean true/false
     */
    public Date addJob(SpiderFlow spiderFlow) {
        try {
            JobDetail job = JobBuilder.newJob(SpiderJob.class).withIdentity(getJobKey(spiderFlow.getId())).build();
            job.getJobDataMap().put(JOB_PARAM_NAME, spiderFlow);
            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(spiderFlow.getCron()).withMisfireHandlingInstructionDoNothing();
            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(spiderFlow.getId())).withSchedule(cronScheduleBuilder).build();
            return scheduler.scheduleJob(job, trigger);
        } catch (SchedulerException e) {
            logger.error("创建定时任务出错", e);
            return null;
        }
    }

    public void run(String id) {
        Spider.executorInstance.submit(() -> {
            spiderJob.run(id);
        });
    }

    public boolean remove(String id) {
        try {
            scheduler.deleteJob(getJobKey(id));
            return true;
        } catch (SchedulerException e) {
            logger.error("删除定时任务失败", e);
            return false;
        }
    }
}
